Boring Bar Air Supply Path for Chip-Free Bearing Cooling
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Solution Overview
Problem
Chips and coolant entering the gap of a rotation mechanism of the boring bar hinder its rotation, and the bearing portion generates heat due to friction, requiring effective cooling without coolant application, especially during automatic tool head or support jig switching.
Innovation Solution
A cutting machine with an air supply mechanism that includes a support block, jig, and switching valve to prevent coolant and chips from entering the air flow path by using air to discharge them before the valve opens, ensuring stable rotation and support of the boring bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is applied to cool the bearing portion, then the bearing portion can be cooled, but coolant and chips may enter the air flow path and hinder rotation mechanism operation
Solution Approach 1:
The air supply mechanism is segmented into multiple independent air supply ports positioned at different locations around the bearing portion. This segmentation allows air to be supplied from multiple directions simultaneously, ensuring comprehensive cooling coverage while maintaining a clean air flow path that prevents chip and coolant contamination of the rotation mechanism.
Solution Approach 2:
Air acts as an intermediary substance to cool the bearing portion without direct contact between coolant and the bearing. The air flow path serves as a separate channel that delivers cooling air to the bearing portion while being physically isolated from the coolant application area, thus preventing contamination while achieving the cooling function.
2Productivity
If multiple tool heads and support jigs are used for automatic switching, then machining efficiency is improved, but chips and coolant may be caught between components and enter air passages
Solution Approach 1:
Air is supplied to the air flow path before the tool heads or support jigs are switched or before machining operations begin. This preliminary air supply creates a protective air curtain or pressure field that prevents chips and coolant from entering the air passage during subsequent switching operations or machining processes.
Solution Approach 2:
The system uses pneumatic pressure from air supply to control the direction and flow of chips and coolant away from the air passage. By adjusting air pressure and flow rate, the system creates a pneumatic barrier that prevents harmful factors from entering sensitive areas while allowing multiple tool heads and support jigs to operate in close proximity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The air supply mechanism effectively prevents coolant and chips from entering the air flow path, maintaining smooth rotation and support of the boring bar, while cooling the bearing portion, thus ensuring stable machining operations.
Implementation Method 1
an air supply mechanism configured to supply air from the support block to an interior of the jig
Implementation Method 2
a switching valve disposed in the second air flow path and configured to allow the first air flow path and the second air flow path to communicate with each other when being pressed by the connecting portion
Implementation Method 3
a discharge passage is disposed in at least one of the connecting portion or the connected portion, and before the switching valve is opened, the discharge passage communicates with a space surrounded by the connected portion, the connecting portion, and the switching valve
Data Source
AI summary
This cutting machine is provided with an air supply mechanism. The air supply mechanism feeds air into the interior of a jig from a support block. The air supply mechanism comprises: an air supply flow passage provided to the support block; an air flow passage provided to the jig; and a switching valve provided to the air flow passage. Before the switching valve is opened during a process of an operation for connecting the jig and the support block, a discharge passage is brought into communication with a space enclosed by a first reference seat of the jig, a connection part of the support block, and the switching valve.